Mr. Riley says, "Approx 4 weeks following initiation, Poa appears to display a sunken appearance and slight chlorosis. Very similar to response from Paclobutrazol. No effects to bentgrass.

Can you tell where I placed a door mat to
serve as my untreated control. Unbelievable! It’s too early to know
if the treated Poa is dead, as it is sunken and buried by sand
topdressing. Regardless, it’s definitely not as happy as the untreated
Poa. It’ll be interesting to see how things look once the turf greens up
and the spring flush kicks in.